Carriage-operating mechanism for grinding-machines.



Patented Deb. 26, I899.

A. B. LANDIS. CARRIAGE OPERATING MECHANISM FOR GRINDING MACHINES.

(Application filed Aug. 26, 1899.)

5 Sheets-Sheet I.

(No Model.)

Patented Dec. 26, I899.

A. B. LANDIS. CARRIAGE OPERATING MECHANISM FOR GRINDING MACHINES.

lApplication filed Aug. 28, 1899.)

5 Sheets-Sheet 2.

(No Model.)

Patented Dec. 26, I899. A. B. LANDIS. CARRIAGE OPERATING MECHANISM FOR GRINDING MACHINES.

Application filed u 26, 1899.)

5 Sheets-Sheet 3.

(No Model.)

I IHH HU H U I I Qwvemtoi Witmwow 5&6, WM

(No Model.)

Wm wows A. B. LANDIS. CARRIAGE OPERATING MECHANISM FOR GRINDING MACHINES.

(Application filed Alig. 26, 1899.)

Patented Dec. 26, I899.

5 Sheets-Sheet 4.

,900. Patented 080.26, I899.

A. B. LANDIS. CARRIAGE OPERATING MECHANISM FOR GRINDING MACHINES.

(Application filed Aug. 26, 1899.)

5 Sheets$heet 5.

//\ VEN TOR W/ TNE SSE S W MW so from gany convenient source of power eon-f ta rigidly-fixed collar 25, and a tapered face and it consists particularly in certain imfrom the dotted line 3 3 in Fig. 4; .Fig. 4, a transversesection on the dotted line 4 4 in UNITED STATES PATENT OFFic E.

CARRIAGE-"OPERATING MECHANISM FOR GRINDliiG-MACHINES.

SPECIFICATION forming part of Letters Patent No. 639,900, dated December 26,1899.

Application filed August 26, 1899.

My said invention relates to various improvements in the construction and arrangement of parts of grinding-machines of that character shown inPatents Nos. 483,28 8,' 544,439, and others heretofore granted'tome;

provements in the mechanism for a'utomat-g ically reversing the travel of the emery-wheel carriage, wherebythe point of reversing may sired to suit any job of work, all as will be hereinafter more fully described and claimed.

Referring to the accompanying drawings, which. are made" apart hereof and on which similar reference characters indicate similar} parts, Figure 1 is a side elevation of a grinding machine embodying my said improvements;- Fig. 2, a transverse section through the machine on the dotted line 2 2 in Fig. 1'; Fig. 3, a detail view, partly in section, of a portion of Fig. 1 on an enlarged scale as seen when look-= ing in the direction indicated. by the'arrows Fig. 3 Fig. 5, a detail view of the dogs and upper portion of the wheel carrying the same, which operate or trip the reversing mechanism; Fig. .6,-a cross-section on the dotted line 6 6 in Fig. 5, and Fig. 7 a detail section on the dotted line 7 7 in Fig. 2. v

Iu'said drawings the portion's marked A representthe frame of the machine, B the emerywheel carriage, O the emery-wheel-'base, D the head-stock, and E the foot-stock, all of which parts are or may be of any approved construction, as they form no part of this invention,-'except in a general waythey must be of a form adapted to be used and operate therewith.

The, machine is driven by a main shaft 1 nected by belts with the pulleys 2 thereon; Said shaft is journalediu bearings 3, 4, and 5,

Serial No. 728,584. (No model-ll mounted on the frame, and on itsinner end the inner end of said shaft 8 and meshes with a bevel-gear 10 on the carriage-driving shaft -11, whereby said carriage is driven. .Said

- wheel 7 has one part 13 of a clutch on its hub.

The double-faced part 14 of the clutch is secured by aspline on said shaft,,and another wheel 15,conresponding to wheel 7,w'it h'a simithe clutch is adapted to be shifted by a shiftiug-fork 16, mounted rigidly on a rock-shaft the frame. The prongs of said fork are projacent faces near their outer ends, which eugage in a circumferential groove in said part .14, as is usual. 4 The pinion 6 on shaft l'is of considerable length, as shown, and meshes is mounted in suitable bearin gs alongside said shaft 1 and just behind it. Adjacent to the a pinion 21, which meshes therewith. By this when wheel7 is lockedto shaftSthroughthe clutch mechanism said shaft will begdriv'en, in one directionfrom shaft 1 direct, but when in the opposite directionthrough pi'nion 21, shaft 20, and its connection to shaft Ljust'deand the travl of the carriage B changed by mechanism hereinafter described.

The carriage-driving shaft 11 is journaled in suitable bearings and has a pinion 23 on Bally-extending toothegra'c k bar 24 on the underside of carriage B. aid carriage is mountonthe frame,as is well understood. The bevellthe -'o'nte'r"end of its hub abutting against 1 is formed on a hub portion on the inside of is formed with a pinion 6, which meshes with a'gear-wheel 7, monntedon a counter-shaft 8, journaled in suitable bearings above said, shaft 1. A beveled pinion 9 is mounted on lar clutch part on inner liub,is also {mounted on said shaft 8. Saiddouble-faced part 14jof vided with autifriction-rollers 18 on their ad- "gear-wheel 15 said shaft 20 is provided with wheel 15 is' locked to shaft 8 bythe shifting of'cl'utch part 14 'the said shaftSwillbe driveu'.

scribed. Said clutch part 14 may beshifted 17, which is journaled in suitable bearings in with a pinion 19 on a counter-shaft 20, which 5 arrangemena'as will be readily understood,

hand through the medium of thelever 22 on the shaft 17 or by the automatic shifting its inner end, whichmesheswith alongitudied in suitable ways .to travel back and forth IOO gear 10 is mounted loosely on said shaft 11,

. mounted on a transversely-extending pin 43.

tion., Said the wheel to serve as a part of a friction-,

clutch. The other part 26 of said clutch conslsts of a heavy ring or collar having a correspondingly-tapered inner face adapted to fit over and engage the tapered face of said hub. Its opposite end has a transverse groove and a key 27, which extends through an elongated mortise in said shaft 11, engages with said groom and locks said part 26 to said shaft. A central longitudinal perforation extends from the outer end of said shaft to the slot containing the key 27, and a rod 28 is'mounted therein with its inner end abutting the edge of said key. The outer end of said perfora-- tion is screw-threaded, and a screw 29, with .a hand-wheel or thumb-nut on its outer end,

to shaft 11 and starting said shaft in motion. 'By backing said screw 29 suflieiently to permit, the weight of the work will quickly release the engagement and said shaft will stop.

Alongside the part 26 is a pinion 30, mount 'ed on shaft 11 and connected thereto by a transverse groove in its hub or flange, which also engages the key 27, the flange of part 26 being bored out to permit that of said pinion to pass within, as shown, or of course the parts 26 and 30 could be formed in one piece, the object in forming as described being to permit the pinion to be of steel and the other part of cast metal, and thus secure the greatest efiiciency at the smallest cost of construcpinion 3 meshes'with gear 31, which is keyed to shaft 32, which is journaled in suitable bearings, and has a pinion 33 formed on its opposite end, which meshes with a gear 34, formed around a circumferential flange f on the wheel 35, which carries the dogs 36. Said wheel 35 has an elongated central hub h, which is mou nted on shaft 11 which shaft is journaled in a suitable bearing 37 in the frame. Said shaft and the parts thereon are held in place by the collar 25 and wheel 10 on one side and the hand-wheel 38, rigidly secured on the outer end of said shaft; Mounted on the flangefof the wheel 35 is a ring 39, having an upwardly-extending arm 40 and a downwardly-extending arm 41, forming a lever. Said arm 40 has a strike 42,

between ways or flanges on the top thereof, said pin extending through a vertical slot in one of said flanges and serving as a means for lifting said strike out of the way of the dogs, when desired, as will be presently described. The downwardly-extending arm 41 is connected at its'lower end by means of a link 44 to the lower end of a downwardly-extending ai'm 45 on the rock-shaft 17, carrying the shifting fork 16. Said wheel 35 is formed with a concave periphery in cross-section havi mg a Worthgrooves, are mounted the dogs 36.

gear thereon. It is also formed with a circumferential groove 9 in its face near its pe riphery. On said periphery, held in said Said dogs consist of blocks of suitable dimensions, the upper corners of the adjacent faces of which are adapted to contact with the strike 42 and turn the ring 39 on its pivot sufficiently to shift the clutch 14 through the arm 41, link 44, and

{connecting parts, above described. Each of said blocks rests upon the outside smooth corners of the Wheel 35 and has flangeswhich extend down on each side thereof. On the front side a curved rib or segment 46 is secured on the inner face of the flange and engages the groove 9, and thus secures said block to said wheel. Its outer end is bored out, as shown,

to receive the shank of a short worm-gear 47.

The inner end of said shank is bulb-shaped and the seat therefor correspondingly formed in order to allow both rotatory andvertical motion of the worm. It is secured in said seat by means of a spring-48, which has a head on its outer end and extends through a central perforation in said worm and shank. Ahead on its outer end seats in a countersunk outer portion of said perforation,and its inner end is seen red bya transverse screw 49, which extends through and clamps said spring. There is sufficient space left in the upper part of the seat (see Fig. 5) for its shank to permit said worm to be lifted sufliciently to disengage it from the gear in the periphery of the wheel, and a concave depression in its outer end furnishes a convenient hold for the thumb, the fingers being placed against th face of the dog to seize and raise said worm. Upon being released the spring 48 immediately returns and retains said worm into engagement with the gear on the 'wheel. By this means the dogs can be adjusted to. any position desired on the wheel, so that the travel of the carriage can be regulated to suit the length of the work being ground. By taking hold of the dog, as above explained, and lifting the worm out of engagement with the gear it can be readily slid around the periph cry to any position desired, and by turning the worm after its engagement its position can be very finely adjusted, so that the finest and most accurate work can be done. The peripheryof the Worm may be roughened o'r knuried, if desired, as shown at the right in Fig. 5, to afford a better hold for the thumb and finger in turning during the operation of adjusting. When for any reason it is desired that the grinding shall continue beyond the fixed point, the operator can raise. the strike 42 out of the path of the dogs, when the carriage will continue to the point desired,-when the shifting mechanism can be thrown by the hand-lever 22. This. can be done without disturbing the adj ustment of the dogs to the slightest degree, and the 'desired result being accomplished, as the removing of some imperfection, the automatic operation will continue as before between '5 readily understood.

. the same until it passes, over its apex, when desired direction. The clutch 26 is then forced the exact poinfis for which the machine is set. In adjusting t e parts before the operation begins thez'hand-wheel 38 is used to bring the carriage to the desired point, as will be the force of the spring operates to quickly throw said arm to one side, and thus throw the clutch part 14 after it has 'beenmeleased of the arm through the contact of the appropriate dog quickly into engagement with the other.. As will be noticed by reference to Fig. 3, considerable playis left between the antifriction-rollersonthe ends of the shifting-fork prongs and the sides of the groove in part 14,'which allows the roller on the lower end of extension 41 to pass well over the apex of the cam-block before the clutch 30 is disengaged, when the spring will efiectually throw said clutch 14 into-engagement with one of the other clutch parts, which action makes the shifting quick and at the ex act point desired. I

The operation of the several portions of the mechanism having been described above, the operation of the whole may be briefly recapitulated, as follows The carriage may be moved by hand through the hand-wheel 38 to bring the wdrk into the exact relation desired with the emery-wheel, so that the dogs canbe set at the exact point-to continue the grinding over that portion of the article desired to be ground and no further, the dogs 45. being moved to position and then finely adj usted by turning the worms, asbefore described. The machine is started in operation by connecting the shaftlwith the power and throwing clutchr'lart 14 to engage the wheel on shaft 8, which will drive said shaft in the into engagement with wheel 10, which starts shaft 11 and the carriage B and"the other: When mechanism operated by said shaft. the carriage has traveled to bring the work to the point where the grinding is to stop, the appropriate dog 36 will contact with the strike 42 and through the mechanism described shift the clutch -part14 and start the carriage back. When the point at' which the grinding should stop at the other end is reached, the same operation is repeated. Thus the canriage will continue to travel back and forth without attention until the operation is completed, and the length or its travel can be 1 made as long or as short as desired and adjusted to a thousandth of an inch, so that the rately done.

finest and most delicatewoi-k can be accu- Having thusfully described my said invention, what I claim as new, and desire to secure by Letters Patent, is-- 1. In a carriage-shifting gear, the combination, of the gearing for driving said carriage in either direction, theshiftingmechanism for changingfrom one direction to the other, and mechanismfor operating said shifting mechanism consisting of a'pivoted arm or 1ever connected at one point to said shifting mechanism and having a-strike-or contactpoint thereon mounted to be driven by the carriage-driving mechanism across the'pathi of said strike, said-dogs being mounted tobe adjusted on] the part which carries. them,

whereby said lever 'maybe -thrown,,and

' through it the shifting mechanism at .di'iferent points, substantially as set forth.

2. In a carriage-shifting mechanism, the

combination of the carriage-driving gear, the gear for shifting its'direct-ion, and mechanism for operating'the same consisting of dogs mounted on a part driven from the carriagedriving gear, and adapted to strike and throw the shifting mechanism, said dogs being mounted to be adjusted to diiferent relative positions on the part which-carries them by means of a. worm-gear, substantially as set forth- 3. Ina carriage-shifting mechanism, the

combination, of the carriage-driving gear, the

gear for shifting its direction and mechanism for operating the same, which consists of a lever pivoted around the carriage-operating shaft connected at one end to the shifting device, and at the other end carrying'astrike,

a wheel mounted to be operated by said shaft and carrying adjustable dogs arranged to come in contact with said strike and operate said lever, and through it said shifting device, and said dogs, substantially asset' forth.

4. In a shifting mechanism, the combination, of the operating-gear, the shifting device, an operating-lever connected therewith, and a wheel'carrying dogs arranged to contact with said lever and operate it to operate said shifting device, and said dogs, consisting 'in part of worm-gears which engage with a worm formed on the periphery of said wheel,

wherebythey may be finely adjusted and 0x 'a'ctlyheld in place, substantially as set forth.

' 5. In a shifting mechanism, the combination, of the operating-gear, the shifting device, an operating-lever connected therewith, and a wheel carryingdogs arranged to conv tact with said lever to operateitand through it the shifting device, said wheel being'formed with a worm on its periphery and an annular groove in its'side, and said dogs consisting of blocks which have a part engaging said groove to slide therein, and worm-gears which enwheel, substantially as set forth.

6. In..a;-shifting mechanism, the combination, of theoperating-gear, the shifting de- IIO . 3 7 gage with said worm on the periphery of the vice, the lever for operating said shifting de vice, a strike thereon mounted to be adjusted within or without the path of the dogs, the wheel carrying the dogs, and the dogs mounted on said wheel, substantially as set forth.

7. A device for operating the shifting mechanism of a carriage-operating gearconsisting of a lever, and a wheel carrying dogs adj ustable thereon by worm-gear, which dogs are arranged to strike and operate said lever, substantially as set forth.

8. In acarriage-operating mechanism, tFe combination, of the carriage-operating she. is, a gear-wheel loosely mounted thereon,a clutch r 5 mechanism for looking it to said shaft, a shaft geared to said wheel, two gear-Wheels loosely mounted thereon each carrying a clutch part, a double-faced clutch part mounted between them for locking one or the other to said shaft, shifting mechanism for throwing said clutch part into engagement with one or the other, the main driving-shaft geared directly to one of said wheels and through a countershaft to the other, the mechanism operated 2 5 by said carriage-operating shaft for automatically operating said shifting mechanism to reverse said carriage at the point desired, substantially as set forth.

9. The combination, in a carriage-operating 3o mechanism, of the main shaft, the countershaft geared to the carriage-operating shaft, gear connecting said main shaft .and said counter-shaftfor drivingit in both directions, shifting mechanism, for throwing eithengear into operation, said carriage-operatingshaft,

-a ring pivoted around its outer end with an arm extending out from opposite sides thereof, forming a lever, a connec ion from one of said arms to the shifting mechanism, astrike on the other arm, a wheel journaled in bearings around the outer end of said carriageshaft, dogs mounted on said wheel in position to contact with said strike, said wheel carrying the dogs being geared to said carriage- 4 5 shaft, substantially as set forth.

10. In a carriage-operating mechanism, the combination, of the shaft geared to said carriage, the driving mechanism therefor, the shifting mechanism, the dog-carrying Wheel .50 mounted around the outer end of said 'shafti .rand provided with a toothed flange on its inside face, a pinion meshing therewith and driven through suitable gear from said shaft, the dogs mounted on said wheel, the lever pivoted around said wheel with which said dogs are adapted to contact, and connections from said lever to the shifting mechanism, substantially as set forth. I

11. In a carriage-operating mechanism, the

6o combination, of the carriage-operating shaft,

the driving-gear therefor, the clutch for connecting said gear with said shaft, said clutch being connected to said shaft bya key mounted in a longitudinal perforation in said shaft and bearing against said key, a screw in the outer end of said perforation for adjusting the rod, and the shifting mechanism, also operated from said carriage-shaft, substantially as set forth.

12. In a carriage-shifting mechanism, the

- combination, of the driving-gear, shifting de vice, the mechanism for operating said shifting de'yice consisting of a lever connected thereto, a wheel carrying dogs arranged to strike a point on'said lever and operate it, gearing connecting said wheel to the driving mechanism, said dogs being mounted on said wheel to slide and adj ustably held by means of aworm-gear, said gear being connected to the base of the dog by a spring, whereby it may be lifted out of engagement when desired, substantially as set forth.

. 13. In acarriage-operating mechanism, the driving-gear, the shifting device, the mechanism for operating said shifting device, consisting of a lever connected at one end to said shifting device, and arranged to connect with operating means at its other end, one of said ends being arranged to pass over a camshaped end of a spring-mounted block as it passes from one position to the other, and said block, whereby said spring operates to assist in throwing said lever and the shifting device, substantially as set forth.

14. In a carriage-operating mechanism, the combination, of the driving-gear, shifting dcvice, and means for operating said shifting device which embodies dogs adjustably mount- -ed on a carrying part by means of a-wormgear, said dogs being arranged to strike and operate the shifting device, substantially as set forth.

15. In a carriage-reversing mechanism; the combination of a dog-wheel, worm-hobbed on its periphery, dogs mounted on said wheel having worms to engage its periphery, which by raising are disengaged, allowing them to he slid to any position and are self-engaging and so held by a spring, said worm to-make close adjustments with a lever connected to the carriage-reversing gearing, whereby said lever is operated, substantially as set forth. In witness whereof I have hereunto set my hand and seal, at \Vaynesborough, Pennsyl vania, this 22d day of August, A. D. 1899.

ABRAHAM B. LANDIS. [L. 

